Degradation of co-evaporated perovskite thin film in air

被引：36

作者：

Wang, Congcong ^{[1
]}

Li, Youzhen ^{[2
]}

Xu, Xuemei ^{[2
]}

Wang, Chenggong ^{[1
]}

Xie, Fangyan ^{[3
]}

Gao, Yongli ^{[1
,2
]}

机构：

[1] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

[2] Cent S Univ, Sch Phys & Elect, Changsha 410083, Hunan, Peoples R China

[3] Sun Yat Sen Univ, Instrumental Anal Ctr, Guangzhou 510275, Guangdong, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2016年 / 649卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

SOLAR-CELLS; LOW-COST; STATE; EFFICIENCY;

D O I：

10.1016/j.cplett.2015.12.046

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Methylammonium lead halide perovskites as highly promising photovoltaic materials have been found unstable in air. We investigated the degradation of CH3NH3PbI3 by air exposure using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). The stoichiometric sample was grown with co-evaporation of PbI2 and CH3NH3I on an Au coated Si wafer. It was found that the perovskite thin film gradually turned to PbI2 in air, accompanied with complete removal of N and substantial reduction of I. It was also observed that PbI2 crystallization roughened the film and resulted in a partial exposure of the Au substrate. (C) 2015 Published by Elsevier B.V.

引用

页码：151 / 155

页数：5

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